Data storage device and actuator control method

Details Data storage device and actuator control method Data storage device and actuator control method

2006-05-16

2006-05-16

Sniezek, Andrew L. (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078040

Reexamination Certificate

active

07046474

ABSTRACT:
Embodiments of the invention prevent the magnetic head from dropping to the magnetic disk when it is retracted. If the power supply Vcc to the drive is interrupted, a power supply voltage detecting section detects that the power supply to the drive is interrupted. A control section sets switches to the ON state in order to discharge the charged retract capacitor and supply the discharge current to a voice coil. The control section retains the switches in the ON state for a period which is determined based on the discharge period specifying control data stored in a register and the count signal from a counter. A voice coil motor, to which the current is supplied, turns the actuator in the unloading direction to retract the actuator to the ramp.

REFERENCES:
patent: 6765746 (2004-07-01), Kusumoto
patent: 2000-021073 (2000-01-01), None

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